Search found 335 matches

by Anders Troberg
Tue Mar 27, 2007 2:02 pm
Forum: Valveless pulsejet forum
Topic: What happened to the Kazoo?
Replies: 7
Views: 3507

How did they run (at least some in that photo looks like they've been running)? It is very difficult to smash the intake to proper dimensions, and some work needs to be done to fuel it well, being a slot like inlet. Wouldn't it be possible to insert a cylinder of the wanted diameter, squash the inta...
by Anders Troberg
Mon Mar 26, 2007 2:37 pm
Forum: Valveless pulsejet forum
Topic: What happened to the Kazoo?
Replies: 7
Views: 3507

What happened to the Kazoo?

What became of the Kazoo? I thought it was such an amazingly simple concept, I just can't help chuckling when I think about making a jet engine by making a jig out some spare pieces of wood, put a tube in it and drive over it with a car. While maybe not optional, did anyone get one to run properly? ...
by Anders Troberg
Mon Mar 26, 2007 2:28 pm
Forum: Valveless pulsejet forum
Topic: Galvanized steel?
Replies: 16
Views: 7382

Re: Galvanized steel?

The steel is carbon steel. You can weld it to stainless with 308 filler rod. I usually soak gavanized parts in vinegar for 12-24 hours to remove the plating, so you are not subject to toxic fumes when welding or running the motor. And if you still get some fumes, you'll usually wake up in the middl...
by Anders Troberg
Wed Mar 21, 2007 11:47 am
Forum: Valveless pulsejet forum
Topic: Let's make valveless turbine bicycles!
Replies: 56
Views: 28528

You should make a version with a bike for ladies first, as it will have the side benefit of taking care of any leg hairs, especially if you put some kind of afterburner on it... How do you intend to fuel a spinning engine? I have a distinct feeling that a spinning tank will make for a bumpy ride. Ar...
by Anders Troberg
Wed Mar 14, 2007 10:19 am
Forum: Off topic forum
Topic: Instant Photos, Thanks to Johansson!
Replies: 12
Views: 5901

Final approach on the Great Path to Mount Cottrill. The mountain grows volcano-like, and is composed of manure and urine-soaked sawdust. A volcano of manure and urine-soaked sawdust. I sure hope it doesn't erupt... We had somw snow this year, about 1 inch. Can you believe that's enough to get the k...
by Anders Troberg
Fri Feb 23, 2007 12:46 pm
Forum: Ramjet forum
Topic: Ramjet helicopter
Replies: 18
Views: 17328

the rudder does not need to counter the rotor as the rotor is not powered through the main shaft in normal helicopters the tail rotor or fin is to counteract the torque from driving the rotors Even if there is no torque per se, there is still friction in the bearings and a rotating air stream that ...
by Anders Troberg
Fri Feb 23, 2007 10:22 am
Forum: Ramjet forum
Topic: Ramjet helicopter
Replies: 18
Views: 17328

I wouldn't fly in such a device, there are easier ways to kill yourself. Some technical considerations: * The stick, as far as I can see, will be working exactly the opposite as a normal stick, ie push it forwards to go backwards. * How is the fuel fed to the tip jets? * How long is that tank going ...
by Anders Troberg
Mon Feb 12, 2007 12:47 pm
Forum: Off topic forum
Topic: Centrifuge BB gun
Replies: 2
Views: 1916

The linked article links to this article: http://gizmodo.com/gadgets/gadgets/dread-silent--monster-weapon-spins-out-120000-rounds-per-minute-224739.php That article has this little gem: With this monster, it's easy to fill the air with lead (or steel, tungsten, tungsten carbide, ceramic-coated tungs...
by Anders Troberg
Mon Feb 05, 2007 3:37 pm
Forum: Off topic forum
Topic: GLC & Luc & Viv vanished?
Replies: 5
Views: 2990

Great news, and it's amazing to see a pulse jet company go beyond the "hobbyist in the garage"-stage!

Keep it up!
by Anders Troberg
Sat Dec 23, 2006 7:05 am
Forum: Tools and Construction
Topic: Whats the easiest way to cut shapes in sheet metal?
Replies: 19
Views: 12494

Always go for the separate tool if you can. Addons for drills are clumsier. If you have a good compressor, go for the pneumatic one, as it is probably smaller and more nimble, otherwise the electric one is best.
by Anders Troberg
Fri Dec 22, 2006 7:17 am
Forum: Valveless pulsejet forum
Topic: Succesfull school project
Replies: 9
Views: 3986

We varied the sparkplug frequencies between 20-200 Hz.
When it's running, you can turn off the spark plug. If it runs properly, it will self sustain without the spark.
by Anders Troberg
Fri Dec 22, 2006 7:13 am
Forum: Off topic forum
Topic: STS Could LAND IN N.M
Replies: 2
Views: 1577

Bring a Swedish flag, Sweden's first astronaut is on that shuttle!
by Anders Troberg
Fri Dec 22, 2006 7:09 am
Forum: Off topic forum
Topic: Photo's of Air Craft Transitioning to Super Sonic
Replies: 5
Views: 2769

Great photos, although isn't it somewhat immasculating for a fighter jet to wear a ballerina skirt?
by Anders Troberg
Mon Dec 18, 2006 9:24 am
Forum: Off topic forum
Topic: Lures
Replies: 10
Views: 4398

re: Lures

He makes some smaller sizes that he uses for dolphin.
Dolphin? I didn't even think they were fished?
by Anders Troberg
Thu Dec 14, 2006 9:54 am
Forum: Tools and Construction
Topic: Should I be using a flashback arrestor
Replies: 5
Views: 3832

re: Should I be using a flashback arrestor

Ultimately it's up to you--could your tank explode? Yes. Will it explode? Probably not--but you know the saying "better safe than sorry".
Or, in other words: "Do you feel lucky, punk?"